Instead of polling for mcslock to be updated, use wait event scheme
for this case.
Signed-off-by: Feifei Wang <feifei.wa...@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.w...@arm.com>
---
lib/eal/include/generic/rte_mcslock.h | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/lib/eal/include/generic/rte_mcslock.h
b/lib/eal/include/generic/rte_mcslock.h
index 9f323bd2a2..264c04021f 100644
--- a/lib/eal/include/generic/rte_mcslock.h
+++ b/lib/eal/include/generic/rte_mcslock.h
@@ -84,8 +84,7 @@ rte_mcslock_lock(rte_mcslock_t **msl, rte_mcslock_t *me)
* to spin on me->locked until the previous lock holder resets
* the me->locked using mcslock_unlock().
*/
- while (__atomic_load_n(&me->locked, __ATOMIC_ACQUIRE))
- rte_pause();
+ rte_wait_event_32(&me->locked, INT_MAX, 0, !=, __ATOMIC_ACQUIRE);
}
/**
@@ -117,8 +116,13 @@ rte_mcslock_unlock(rte_mcslock_t **msl, rte_mcslock_t *me)
/* More nodes added to the queue by other CPUs.
* Wait until the next pointer is set.
*/
- while (__atomic_load_n(&me->next, __ATOMIC_RELAXED) == NULL)
- rte_pause();
+#ifdef RTE_ARCH_32
+ rte_wait_event_32((volatile uint32_t *)&me->next, UINT_MAX, 0,
==,
+ __ATOMIC_RELAXED);
+#else
+ rte_wait_event_64((volatile uint64_t *)&me->next, ULLONG_MAX,
0, ==,
+ __ATOMIC_RELAXED);
+#endif
}
/* Pass lock to next waiter. */
--
2.25.1
